GF/src is now for 2.9, and the new sources are in src-3.0 - keep it this way until the release of GF 3

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+\batchmode
+%This Latex file is machine-generated by the BNF-converter
+
+\documentclass[a4paper,11pt]{article}
+\author{BNF-converter}
+\title{The Language Core}
+\setlength{\parindent}{0mm}
+\setlength{\parskip}{1mm}
+\begin{document}
+
+\maketitle
+
+\newcommand{\emptyP}{\mbox{$\epsilon$}}
+\newcommand{\terminal}[1]{\mbox{{\texttt {#1}}}}
+\newcommand{\nonterminal}[1]{\mbox{$\langle \mbox{{\sl #1 }} \! \rangle$}}
+\newcommand{\arrow}{\mbox{::=}}
+\newcommand{\delimit}{\mbox{$|$}}
+\newcommand{\reserved}[1]{\mbox{{\texttt {#1}}}}
+\newcommand{\literal}[1]{\mbox{{\texttt {#1}}}}
+\newcommand{\symb}[1]{\mbox{{\texttt {#1}}}}
+
+This document was automatically generated by the {\em BNF-Converter}. It was generated together with the lexer, the parser, and the abstract syntax module, which guarantees that the document matches with the implementation of the language (provided no hand-hacking has taken place).
+
+\section*{The lexical structure of Core}
+
+\subsection*{Literals}
+String literals \nonterminal{String}\ have the form
+\terminal{"}$x$\terminal{"}, where $x$ is any sequence of any characters
+except \terminal{"}\ unless preceded by \verb6\6.
+
+
+Integer literals \nonterminal{Int}\ are nonempty sequences of digits.
+
+
+Double-precision float literals \nonterminal{Double}\ have the structure
+indicated by the regular expression $\nonterminal{digit}+ \mbox{{\it `.'}} \nonterminal{digit}+ (\mbox{{\it `e'}} \mbox{{\it `-'}}? \nonterminal{digit}+)?$ i.e.\
+two sequences of digits separated by a decimal point, optionally
+followed by an unsigned or negative exponent.
+
+
+
+
+
+TMeta literals are recognized by the regular expression
+\(\mbox{`?'} {\nonterminal{digit}}+\)
+
+CIdent literals are recognized by the regular expression
+\(({\nonterminal{letter}} \mid \mbox{`\_'}) ({\nonterminal{letter}} \mid {\nonterminal{digit}} \mid \mbox{`\_'} \mid \mbox{`''})*\)
+
+
+\subsection*{Reserved words and symbols}
+The set of reserved words is the set of terminals appearing in the grammar. Those reserved words that consist of non-letter characters are called symbols, and they are treated in a different way from those that are similar to identifiers. The lexer follows rules familiar from languages like Haskell, C, and Java, including longest match and spacing conventions.
+
+The reserved words used in Core are the following: \\
+
+\begin{tabular}{lll}
+{\reserved{Type}} &{\reserved{case}} &{\reserved{data}} \\
+{\reserved{in}} &{\reserved{let}} &{\reserved{of}} \\
+{\reserved{rec}} &{\reserved{sig}} &{\reserved{where}} \\
+\end{tabular}\\
+
+The symbols used in Core are the following: \\
+
+\begin{tabular}{lll}
+{\symb{;}} &{\symb{:}} &{\symb{\{}} \\
+{\symb{\}}} &{\symb{{$=$}}} &{\symb{(}} \\
+{\symb{)}} &{\symb{\_}} &{\symb{{$|$}}} \\
+{\symb{{$-$}{$>$}}} &{\symb{$\backslash$}} &{\symb{.}} \\
+\end{tabular}\\
+
+\subsection*{Comments}
+Single-line comments begin with {\symb{{$-$}{$-$}}}. \\Multiple-line comments are  enclosed with {\symb{\{{$-$}}} and {\symb{{$-$}\}}}.
+
+\section*{The syntactic structure of Core}
+Non-terminals are enclosed between $\langle$ and $\rangle$. 
+The symbols  {\arrow}  (production),  {\delimit}  (union) 
+and {\emptyP} (empty rule) belong to the BNF notation. 
+All other symbols are terminals.\\
+
+\begin{tabular}{lll}
+{\nonterminal{Module}} & {\arrow}  &{\nonterminal{ListDecl}}  \\
+\end{tabular}\\
+
+\begin{tabular}{lll}
+{\nonterminal{ListDecl}} & {\arrow}  &{\emptyP} \\
+ & {\delimit}  &{\nonterminal{Decl}}  \\
+ & {\delimit}  &{\nonterminal{Decl}} {\terminal{;}} {\nonterminal{ListDecl}}  \\
+\end{tabular}\\
+
+\begin{tabular}{lll}
+{\nonterminal{Decl}} & {\arrow}  &{\terminal{data}} {\nonterminal{CIdent}} {\terminal{:}} {\nonterminal{Exp}} {\terminal{where}} {\terminal{\{}} {\nonterminal{ListConsDecl}} {\terminal{\}}}  \\
+ & {\delimit}  &{\nonterminal{CIdent}} {\terminal{:}} {\nonterminal{Exp}}  \\
+ & {\delimit}  &{\nonterminal{CIdent}} {\terminal{{$=$}}} {\nonterminal{Exp}}  \\
+\end{tabular}\\
+
+\begin{tabular}{lll}
+{\nonterminal{ConsDecl}} & {\arrow}  &{\nonterminal{CIdent}} {\terminal{:}} {\nonterminal{Exp}}  \\
+\end{tabular}\\
+
+\begin{tabular}{lll}
+{\nonterminal{ListConsDecl}} & {\arrow}  &{\emptyP} \\
+ & {\delimit}  &{\nonterminal{ConsDecl}}  \\
+ & {\delimit}  &{\nonterminal{ConsDecl}} {\terminal{;}} {\nonterminal{ListConsDecl}}  \\
+\end{tabular}\\
+
+\begin{tabular}{lll}
+{\nonterminal{ListPattern}} & {\arrow}  &{\emptyP} \\
+ & {\delimit}  &{\nonterminal{Pattern}} {\nonterminal{ListPattern}}  \\
+\end{tabular}\\
+
+\begin{tabular}{lll}
+{\nonterminal{Pattern}} & {\arrow}  &{\terminal{(}} {\nonterminal{CIdent}} {\nonterminal{ListPattern}} {\terminal{)}}  \\
+ & {\delimit}  &{\nonterminal{PatternVariable}}  \\
+ & {\delimit}  &{\terminal{rec}} {\terminal{\{}} {\nonterminal{ListFieldPattern}} {\terminal{\}}}  \\
+ & {\delimit}  &{\nonterminal{String}}  \\
+ & {\delimit}  &{\nonterminal{Integer}}  \\
+\end{tabular}\\
+
+\begin{tabular}{lll}
+{\nonterminal{FieldPattern}} & {\arrow}  &{\nonterminal{CIdent}} {\terminal{{$=$}}} {\nonterminal{Pattern}}  \\
+\end{tabular}\\
+
+\begin{tabular}{lll}
+{\nonterminal{ListFieldPattern}} & {\arrow}  &{\emptyP} \\
+ & {\delimit}  &{\nonterminal{FieldPattern}}  \\
+ & {\delimit}  &{\nonterminal{FieldPattern}} {\terminal{;}} {\nonterminal{ListFieldPattern}}  \\
+\end{tabular}\\
+
+\begin{tabular}{lll}
+{\nonterminal{PatternVariable}} & {\arrow}  &{\nonterminal{CIdent}}  \\
+ & {\delimit}  &{\terminal{\_}}  \\
+\end{tabular}\\
+
+\begin{tabular}{lll}
+{\nonterminal{Exp}} & {\arrow}  &{\terminal{let}} {\terminal{\{}} {\nonterminal{ListLetDef}} {\terminal{\}}} {\terminal{in}} {\nonterminal{Exp}}  \\
+ & {\delimit}  &{\terminal{case}} {\nonterminal{Exp}} {\terminal{of}} {\terminal{\{}} {\nonterminal{ListCase}} {\terminal{\}}}  \\
+ & {\delimit}  &{\nonterminal{Exp1}}  \\
+\end{tabular}\\
+
+\begin{tabular}{lll}
+{\nonterminal{LetDef}} & {\arrow}  &{\nonterminal{CIdent}} {\terminal{{$=$}}} {\nonterminal{Exp}}  \\
+\end{tabular}\\
+
+\begin{tabular}{lll}
+{\nonterminal{ListLetDef}} & {\arrow}  &{\emptyP} \\
+ & {\delimit}  &{\nonterminal{LetDef}}  \\
+ & {\delimit}  &{\nonterminal{LetDef}} {\terminal{;}} {\nonterminal{ListLetDef}}  \\
+\end{tabular}\\
+
+\begin{tabular}{lll}
+{\nonterminal{Case}} & {\arrow}  &{\nonterminal{Pattern}} {\terminal{{$|$}}} {\nonterminal{Exp}} {\terminal{{$-$}{$>$}}} {\nonterminal{Exp}}  \\
+\end{tabular}\\
+
+\begin{tabular}{lll}
+{\nonterminal{ListCase}} & {\arrow}  &{\emptyP} \\
+ & {\delimit}  &{\nonterminal{Case}}  \\
+ & {\delimit}  &{\nonterminal{Case}} {\terminal{;}} {\nonterminal{ListCase}}  \\
+\end{tabular}\\
+
+\begin{tabular}{lll}
+{\nonterminal{Exp1}} & {\arrow}  &{\terminal{$\backslash$}} {\nonterminal{PatternVariable}} {\terminal{{$-$}{$>$}}} {\nonterminal{Exp}}  \\
+ & {\delimit}  &{\terminal{(}} {\nonterminal{PatternVariable}} {\terminal{:}} {\nonterminal{Exp}} {\terminal{)}} {\terminal{{$-$}{$>$}}} {\nonterminal{Exp}}  \\
+ & {\delimit}  &{\nonterminal{Exp2}}  \\
+\end{tabular}\\
+
+\begin{tabular}{lll}
+{\nonterminal{Exp3}} & {\arrow}  &{\nonterminal{Exp3}} {\nonterminal{Exp4}}  \\
+ & {\delimit}  &{\nonterminal{Exp4}}  \\
+\end{tabular}\\
+
+\begin{tabular}{lll}
+{\nonterminal{Exp4}} & {\arrow}  &{\nonterminal{Exp4}} {\terminal{.}} {\nonterminal{CIdent}}  \\
+ & {\delimit}  &{\nonterminal{Exp5}}  \\
+\end{tabular}\\
+
+\begin{tabular}{lll}
+{\nonterminal{Exp5}} & {\arrow}  &{\terminal{sig}} {\terminal{\{}} {\nonterminal{ListFieldType}} {\terminal{\}}}  \\
+ & {\delimit}  &{\terminal{rec}} {\terminal{\{}} {\nonterminal{ListFieldValue}} {\terminal{\}}}  \\
+ & {\delimit}  &{\nonterminal{CIdent}}  \\
+ & {\delimit}  &{\terminal{Type}}  \\
+ & {\delimit}  &{\nonterminal{String}}  \\
+ & {\delimit}  &{\nonterminal{Integer}}  \\
+ & {\delimit}  &{\nonterminal{Double}}  \\
+ & {\delimit}  &{\nonterminal{TMeta}}  \\
+ & {\delimit}  &{\terminal{(}} {\nonterminal{Exp}} {\terminal{)}}  \\
+\end{tabular}\\
+
+\begin{tabular}{lll}
+{\nonterminal{FieldType}} & {\arrow}  &{\nonterminal{CIdent}} {\terminal{:}} {\nonterminal{Exp}}  \\
+\end{tabular}\\
+
+\begin{tabular}{lll}
+{\nonterminal{ListFieldType}} & {\arrow}  &{\emptyP} \\
+ & {\delimit}  &{\nonterminal{FieldType}}  \\
+ & {\delimit}  &{\nonterminal{FieldType}} {\terminal{;}} {\nonterminal{ListFieldType}}  \\
+\end{tabular}\\
+
+\begin{tabular}{lll}
+{\nonterminal{FieldValue}} & {\arrow}  &{\nonterminal{CIdent}} {\terminal{{$=$}}} {\nonterminal{Exp}}  \\
+\end{tabular}\\
+
+\begin{tabular}{lll}
+{\nonterminal{ListFieldValue}} & {\arrow}  &{\emptyP} \\
+ & {\delimit}  &{\nonterminal{FieldValue}}  \\
+ & {\delimit}  &{\nonterminal{FieldValue}} {\terminal{;}} {\nonterminal{ListFieldValue}}  \\
+\end{tabular}\\
+
+\begin{tabular}{lll}
+{\nonterminal{Exp2}} & {\arrow}  &{\nonterminal{Exp3}}  \\
+\end{tabular}\\
+
+
+
+\end{document}
+